From 7947465eba567b1982e81e38771328d8d1303fce Mon Sep 17 00:00:00 2001
From: jjsuperpower <jjs29356@gmail.com>
Date: Tue, 28 Jun 2022 23:59:02 -0500
Subject: vcd file working for cosim

---
 hdl_lab/.gitignore        |  1 +
 hdl_lab/constants.py      |  5 -----
 hdl_lab/hdl/myhdl_wrap.py | 16 ++++++++++++++++
 hdl_lab/hdl/reset_sync.py | 16 +++++++++-------
 hdl_lab/myhdl_wrap.py     | 31 -------------------------------
 5 files changed, 26 insertions(+), 43 deletions(-)
 delete mode 100644 hdl_lab/constants.py
 delete mode 100644 hdl_lab/myhdl_wrap.py

(limited to 'hdl_lab')

diff --git a/hdl_lab/.gitignore b/hdl_lab/.gitignore
index bae8235..3f63f69 100644
--- a/hdl_lab/.gitignore
+++ b/hdl_lab/.gitignore
@@ -3,4 +3,5 @@ gen_verilog
 simulation
 .vscode
 __pycache__
+**__pycache__
 .pytest_cache
\ No newline at end of file
diff --git a/hdl_lab/constants.py b/hdl_lab/constants.py
deleted file mode 100644
index d40d7c1..0000000
--- a/hdl_lab/constants.py
+++ /dev/null
@@ -1,5 +0,0 @@
-SIM_DIR = './simulation/'
-GEN_VERILOG = './gen_verilog/'
-
-IVERILOG = 'iverilog '
-VVP = 'vvp -M ./ -m myhdl '
\ No newline at end of file
diff --git a/hdl_lab/hdl/myhdl_wrap.py b/hdl_lab/hdl/myhdl_wrap.py
index 2e8fe4e..56c8c5b 100644
--- a/hdl_lab/hdl/myhdl_wrap.py
+++ b/hdl_lab/hdl/myhdl_wrap.py
@@ -9,6 +9,22 @@ class Myhdl_Wrapper():
     def _export(self, **kargs):
         inst = getattr(self, self.class_name)(**kargs)
         inst.convert(hdl='Verilog', path=GEN_VERILOG, name=f"{self.class_name}")
+
+        test_bench_file = GEN_VERILOG + 'tb_' +self.class_name + '.v'
+        test_bench_tmp_file = GEN_VERILOG + '~tb_' +self.class_name + '.v'
+
+        # this is needed to generate cosim vcd file
+        with open(test_bench_file) as f_old, open(test_bench_tmp_file, 'w') as f_new:
+            lines =  f_old.readlines()
+            for line in lines:
+                f_new.write(line)
+                if 'initial begin' in line:
+                    f_new.write('\n')
+                    f_new.write('    // Needed to create vcd file\n')
+                    f_new.write(f'    $dumpfile ("{SIM_DIR + self.class_name}_cosim.vcd");\n')
+                    f_new.write(f'    $dumpvars(0, tb_{self.class_name});\n')
+                    f_new.write('\n')
+        os.rename(test_bench_tmp_file, test_bench_file)
         
 
 
diff --git a/hdl_lab/hdl/reset_sync.py b/hdl_lab/hdl/reset_sync.py
index 3116b9e..04ccdeb 100644
--- a/hdl_lab/hdl/reset_sync.py
+++ b/hdl_lab/hdl/reset_sync.py
@@ -38,7 +38,7 @@ class ResetSync(Myhdl_Wrapper):
     def tb(self, func: Callable):
         async_reset = Signal(False)
         sync_reset = Signal(False)
-        clk = Signal(bool(0))
+        clk = Signal(False)
 
         dut = func(clk=clk, async_reset=async_reset, sync_reset=sync_reset)
 
@@ -62,24 +62,26 @@ class ResetSync(Myhdl_Wrapper):
 
                 yield clk.posedge, async_reset.negedge
                 if async_reset == True:
-                    assert sync_reset.next == False, 'sync Reset did not wait for second clock positive edge'
+                    yield delay(0)
+                    assert sync_reset == False, 'sync Reset did not wait for second clock positive edge'
 
                     yield clk.posedge, async_reset.negedge
                     if async_reset == True:
-                        assert sync_reset.next == True, 'sync Reset did not set'
+                        yield delay(0)
+                        assert sync_reset == True, 'sync Reset did not set'
 
 
 
         @instance
         def stimulus():
             for _ in range(500):
-                yield delay(randint(1,20))
+                yield delay(randint(0,20))
 
                 if (now()+2) % 4 == 0:  # do not create rising edge of reset and clk at the same time
                     yield(delay(1))
 
                 async_reset.next = True
-                yield delay(randint(1, 20))
+                yield delay(randint(0, 20))
                 async_reset.next = False
 
             raise StopSimulation
@@ -103,7 +105,7 @@ def test_reset_sync_sim():
 def test_reset_sync_cosim():
     hdl = ResetSync()
     hdl.export()
-    # hdl.cosim()
+    hdl.cosim()
 
-# test_reset_sync_sim()
+test_reset_sync_sim()
 test_reset_sync_cosim()
diff --git a/hdl_lab/myhdl_wrap.py b/hdl_lab/myhdl_wrap.py
deleted file mode 100644
index 2e8fe4e..0000000
--- a/hdl_lab/myhdl_wrap.py
+++ /dev/null
@@ -1,31 +0,0 @@
-import os
-from myhdl import *
-from constants import *
-
-class Myhdl_Wrapper():
-    def __init__(self):
-        self.class_name = self.__class__.__name__
-
-    def _export(self, **kargs):
-        inst = getattr(self, self.class_name)(**kargs)
-        inst.convert(hdl='Verilog', path=GEN_VERILOG, name=f"{self.class_name}")
-        
-
-
-    # This function links myhdl to icarus verilog sim
-    def _cosim(self, **kargs): #these should have the same signals as logic(), 
-
-        iverilog_cmd = IVERILOG + f"-o {SIM_DIR}{self.class_name}.o {GEN_VERILOG}{self.class_name}.v {GEN_VERILOG}tb_{self.class_name}.v"
-        vvp_cmd = VVP + f"{SIM_DIR}{self.class_name}.o"
-
-        os.system(iverilog_cmd)
-        return Cosimulation(vvp_cmd, **kargs)
-
-    def sim(self):
-        tb = self.tb(getattr(self, self.class_name))
-        tb.config_sim(trace=True, tracebackup=False, directory=SIM_DIR, filename=f"{self.class_name}_sim")
-        tb.run_sim()
-
-    def cosim(self):
-        tb = self.tb(self._cosim)
-        tb.run_sim()
\ No newline at end of file
-- 
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